The boiling point of a substance is determined by the magnitude and type of intermolecular forces required to transition from liquid to gas states, governed primarily by molecular weight, polarity, structural geometry, and functional group identity. Non-polar molecules rely on London dispersion forces which scale with molar mass and surface contact area; polar molecules exhibit stronger dipole-dipole interactions, while specific arrangements where hydrogen bonds directly between electronegative atoms (N, O, F) yield the strongest intermolecular attraction. Consequently, higher boiling points correspond to compounds possessing greater thermal energy requirements due to strong forces such as hydrogen bonding or extended dispersion networks in straight-chain versus branched isomers.
The boiling point of a substance is determined by the magnitude and type of intermolecular forces required to transition from liquid to gas states, governed primarily by molecular weight, polarity, s…